IMAGE RESIZER
☞ runs entirely in your browser — nothing is uploadedDrop your image here
or click to browse — JPG, PNG, WebP, GIF
Preview
OneImageTool
Free Image Tools
IMAGE RESIZER
Change image width and height in pixels or by percentage. Lock aspect ratio, pick output format, and download instantly.
or click to browse — JPG, PNG, WebP, GIF
Preview
exact pixels or quick scale
Need a smaller thumbnail, a larger banner, or exact dimensions for a form upload? OneImageTool resizes photos and graphics right in your browser — no account, no server upload, no watermark.
Enter width and height in pixels, use quick percentage presets, or lock aspect ratio so your photo does not stretch. Export as PNG, JPG, or WebP when you are done.
three steps
Drop a JPG, PNG, WebP, or GIF. The tool reads dimensions and file size instantly.
Type target width and height, tap a 25%–200% preset, or keep aspect ratio locked while you adjust one side.
Pick PNG, JPG, or WebP output and save the resized file to your device.
common jobs
Shrink oversized phone photos before posting or meet platform pixel limits without desktop software.
Reduce dimensions and file weight for faster page loads and lighter newsletters.
Hit exact width × height requirements for job applications, marketplaces, or document uploads.
Upscale or downscale reference images when you need a specific pixel canvas before export.
quick answers
Upload your image, set the output width and height (or use a percentage preset), then download. The resizer runs entirely in your browser.
Yes — keep Lock aspect ratio checked. Changing width updates height automatically (and vice versa) so the image does not stretch.
You can upload JPG, PNG, WebP, and GIF. Download as PNG, JPG, or WebP.
Free users can resize images up to 25 MB. Processing still happens locally on your device.
No. OneImageTool resizes images in your browser using the canvas API. Your files never leave your computer or phone.
Yes — free, no watermark, no sign-up. Resize as many images as you need in a modern browser.